primary, seco ndary, and tertiary spaces). An understanding o f the building's mo st impo rtant spaces and features is critical to evaluating preservatio n trade-o ffs and preserving characterdefining qualities. It is better to install new equipment in seco ndary o r tertiary spaces, and avo id o r minimize intrusio ns in primary architectural spaces. Basements and attics are usually go o d lo catio ns fo r ho rizo ntal ro uting o f systems; existing chases such as fireplaces, flues, and utility clo sets are go o d fo r vertical ro uting o f systems; and use existing penetratio ns and chases to the greatest extent po ssible. Be aware that so me basements may co ntain valuable archeo lo gical sites that sho uld no t be disturbed. Also , janito rial clo sets can be go o d lo catio ns fo r electrical equipment. Where po ssible, use this o ppo rtunity to impro ve o n the placement and functio n o f a building's systems so as to emphasize the building's integrity. BACK TO TO P
RECOMMENDAT IONS A. HVAC—Heat ing, Vent ilat ion, and Air- Condit ioning Cho o se a system and/o r equipment that is appro priate fo r the use o f the building. Fo r instance, a museum has different climatic needs than an o ffice building. General Retain o riginal architectural co nfiguratio ns, surfaces, and finishes, such as vaulted and o rnamental ceilings, pilasters, and capitals. Retain any existing histo rically significant Installation of a dropped ceiling in a historically significant room. Notice the features, such as o riginal registers, radiato rs, detrimental affects to both the scale and escutcheo ns, radiato r enclo sures, etc., by reusing windows of the room. existing ductwo rk, vents/air intakes, and janito rial Photo courtesy National Park Service clo sets. If disturbance is unavo idable, the replacement sho uld match the design, co lo r, texture, and materials o f the o riginal. Match the finished appearance o f the space to the o riginal. Ensure that the additio n o f HVAC systems and o ther repairs will no t co rrupt the building's structural integrity. Distribution System Avo id the need fo r new ductwo rk, especially in lo bbies, co rrido rs, and o ther circulatio n spaces, by examining ductless alternatives such as split systems and pipe systems with reuse o f existing ducts fo r ventilatio n. If new ductwo rk is unavo idable, disturb as little PDFmyURL.com